Try-square.



' C. G. LARSON.

TRY SQUARE. APPLICATION FILED JULY'zl, 190s.

9Q7,556. Patented July 13,1909.

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TINTTED STATES PATENT OFFTQE.

CHARLES G. LARSON, OF BURLINGTON, IOWA, ASSIGNOR OF ONE-HALF lO JOIIN ELIASON, OF MOLINE, ILLINOIS.

TRY-SQUARE.

Application filed July 21, 1908.

Specification of Letters Patent.

Patented July 13, 1909.

Serial No. 444,581.

To all whom it may concern.'

Be it known that I, Oui-rains G. Lanson, a citizen of the United States, residing at Burlington, in the county of Des Moines and State of Iowa, have invented new and useful Improvements in Try-Squares, of which the following is a specification.

This invention relates to foldable try squares, and the object of the invention is to provide an accurate and reliable tr .Y square which may be readily folded into small compass whereby it may be readily fitted into the pocket of a mech anic and thus easi v carried, the device being so constructed that it may be readily unfolded to provide a square which shall be thoroughly accurate.

Vith these and other objects in view the invention resides in the novel construction and arrangement of 'parts hereinafter fully described and claimed.

In the accompanying drawings, liigure I is a side elevation of a square fonstructed in accordance with the present invention. Fig. 2 is a similar view showing the device folded. Fig. 3 is a transverse sectional view taken through the bolts at the upper portion of the device to illustrate the method of securing the blade when the device is set up. Fig. L'l is a transverse sectional view upon the line 4 4 of Fig. 1 looking in the direction of the arrow.

In the accompanying drawings the .numoral l designates the improved square. The square l comprises a handle member 2. The handle member is constructed of a pair of arms 3 and lsuitably spaced apart at their upper ends through the medium of a spacing block 5 secured between the armsby a suitable bolt 6. The arms or members 3 and 4l have their outer faces provid ed with rectangu lar cut away portions adapted to provide a when the square is employed upon sidings. Positioned between the arms 3 and 4. is a locking tongue 7. rl`his tongue 7 is provided Ywith an inclined slot 8 adjacent its lower end and this slot is adapted for engagement with a suitable pin 9 connected with the members 3 and 4 of the handle 2.

Pivotally connected between th e upper portions of the members 3 and 4t as at l() is the blade il member of the device. This blade member 11 is provided with a suitable dependingl portion or lug l2 upon its lower face adjacent its inner end, and this lug 'l2 is adapted to be contacted by the upper edge of the locking tongue 7 when the tongue is swung in the position illustrated in YFig. 1 of the drawings. IVhen the blade il is set up as illustrated in Figs. i and. 3, it will be noted that the squared spacing block 5 engages the upper inner end of the blade, thus providing means whereby the blade is engaged upon this end as well as the tongue 7 contacting the lugs l2 and engaging the undcrface of the blade, thus effectively and securely locking the blade in true position upon the handle.

Vilhen the device is to be knocked down or folded when not in use so as to be readily carried in the pocket of the mechanic, the mechanic grasps the blade 11 with one hand and the tongue 7 with the other hand and swings the tongue upon its pivot 9 until it is entirely clear of theblade Il. 'lhe blade 11 may then be swung toward the handle l and the tongue 7 is revolved so as to complete a circle. The tongue 7 is then drawn toward the bolt G, this action being permitted by the inclined slot S engaging the member 9, and the blade .il is then positioned upon the tongue 7 as clearly illustrated in Fig. l of the drawing. When the parts are to be set up to form a square the operation just explained is reversed. The tongue 7 is pushed away from the bolt t3 causing the said tongue to ride upon vthe walls furnished by the inclined slot S until the pintle 9 is positioned at directly the opposite end of the slot to that occupied when the device is folded. 'lhe blade l1 is swung upon its pivot il) until its edge cortacts the bolt o' and the tongue 7 is swung upon its pivot i) until one of its ends engage the under edge of the blade l i and its upper edges engages with the lug '.12 of the blade, thus causing the device to assume the position illustrated in Fig. l. of the drawing.

From the above description, taken in connection with the accompanying drawings, it will be noted that l. have provided an extremely simple, cheap and ell'cctive knock down or collapsible try square, one which may be easily and quickly set up to form a perfectly true square or which may be readily collapsed to be carried in the pocket of amechanic. lheblade 11 of the square is provided with suitable graduations indieating a foot rule, and the device may be reaiflily employed for measuring when in its knock down position. rl`he longitudinally extending cut away portion of the members 3 and at provides an effective gage.

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When it is desired to square a siding to a window or door frame, the siding may be placed partly upon the same, and a part thereof to rest upon a suitable support but in a common plane with respect to the frame, and the gage set upon the siding to rest at each end against the frame that the siding is to fit, and by marking along the side of the gage next to the frame, it is obvious that said siding may be correctly eut.

Having thus fully described the invention what is claimed as new is:

1. A foldable try square comprising a handle formed of a pair of spaced members, a spacing block between the members at their upper ends, a blade pivotally connected between the members and adapted to contact the spacing block, and a locking tongue pivotally connected between the members and adapted to be swung into engagement with the blade.

2 foldable try square comprising handle formed of a pair of spaced members having their outer edges `provided with a rectangularl cut away portion, a spacing block between the members at their upper ends, a blade provided with a depending lug pivotally connected between the members and adapted to contact the spacing block,

and a locking tongueprovided with an inclined slot pivotally engaged between the members of the handle and adapted to contact, the under face oi' the blade and engage the Vertical Wall of the depending lug when the device is set up. Y

In testimony whereof I aiiix my signature in presence of two witnesses. Y

CHARLES G. LARSON. 1/vitnesses:

ELMER Armes, T. G. HARPER. 

